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Boukair K, Salazar JM, Weber G, Badawi M, Ouaskit S, Simon JM. Toward the development of sensors for lung cancer: The adsorption of 1-propanol on hydrophobic zeolites. J Chem Phys 2023; 159:214712. [PMID: 38059548 DOI: 10.1063/5.0168230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/07/2023] [Indexed: 12/08/2023] Open
Abstract
A healthy breath is mainly composed of water, carbon dioxide, molecular nitrogen, and oxygen and it contains many species, in small quantities, which are related to the ambient atmosphere and the metabolism. The breath of a person affected by lung cancer presents a concentration of 1-propanol higher than usual. In this context, the development of specific sensors to detect 1-propanol from breath is of high interest. The amount of propanol usually detected on the breath is of few ppb; this small quantity is a handicap for a reliable diagnostic. This limitation can be overcome if the sensor is equipped with a pre-concentrator. Our studies aim to provide an efficient material playing this role. This will contribute to the development of reliable and easy to use lung cancer detectors. For this, we investigate the properties of a few hydrophobic porous materials (chabazite, silicalite-1, and dealuminated faujasite). Hydrophobic structures are used to avoid saturation of materials by the water present in the exhaled breath. Our experimental and simulation results suggest that silicalite -1 (MFI) is the most suitable structure to be used as a pre-concentrator.
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Affiliation(s)
- K Boukair
- Laboratoire de Physique de la Matière Condensée, Hassan 2 University, Casablanca, Morroco
| | - J M Salazar
- ICB-UMR 6303 CNRS, Bourgogne Franche Comté University, Dijon, France
| | - G Weber
- ICB-UMR 6303 CNRS, Bourgogne Franche Comté University, Dijon, France
| | - M Badawi
- Laboratoire de Physique et Chimie Théoriques, University of Lorraine, Nancy, France
- Université de Lorraine, CNRS, L2CM, F-57000 Metz, France
| | - S Ouaskit
- Laboratoire de Physique de la Matière Condensée, Hassan 2 University, Casablanca, Morroco
| | - J-M Simon
- ICB-UMR 6303 CNRS, Bourgogne Franche Comté University, Dijon, France
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2
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Rossi RE, Elvevi A, Sciola V, Mandarino FV, Danese S, Invernizzi P, Massironi S. Paradoxical association between dyspepsia and autoimmune chronic atrophic gastritis: Insights into mechanisms, pathophysiology, and treatment options. World J Gastroenterol 2023; 29:3733-3747. [PMID: 37398891 PMCID: PMC10311608 DOI: 10.3748/wjg.v29.i23.3733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/23/2023] [Accepted: 05/06/2023] [Indexed: 06/16/2023] Open
Abstract
BACKGROUND Autoimmune gastritis (AIG) is a progressive, chronic, immune-mediated inflammatory disease characterized by the destruction of gastric parietal cells leading to hypo/anacidity and loss of intrinsic factor. Gastrointestinal symptoms such as dyspepsia and early satiety are very common, being second in terms of frequency only to anemia, which is the most typical feature of AIG.
AIM To address both well-established and more innovative information and knowledge about this challenging disorder.
METHODS An extensive bibliographical search was performed in PubMed to identify guidelines and primary literature (retrospective and prospective studies, systematic reviews, case series) published in the last 10 years.
RESULTS A total of 125 records were reviewed and 80 were defined as fulfilling the criteria.
CONCLUSION AIG can cause a range of clinical manifestations, including dyspepsia. The pathophysiology of dyspepsia in AIG is complex and involves changes in acid secretion, gastric motility, hormone signaling, and gut microbiota, among other factors. Managing dyspeptic symptoms of AIG is challenging and there are no specific therapies targeting dyspepsia in AIG. While proton pump inhibitors are commonly used to treat dyspepsia and gastroesophageal reflux disease, they may not be appropriate for AIG. Prokinetic agents, antidepressant drugs, and non-pharmacological treatments may be of help, even if not adequately evidence-based supported. A multidisciplinary approach for the management of dyspepsia in AIG is recommended, and further research is needed to develop and validate more effective therapies for dyspepsia.
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Affiliation(s)
- Roberta Elisa Rossi
- Gastroenterology and Endoscopy Unit, IRCCS Humanitas Research Hospital, Rozzano 20089, Milan, Italy
| | - Alessandra Elvevi
- Gastroenterology Unit, Fondazione IRCCS San Gerardo dei Tintori, Monza 20900, Italy and Department of Medicine and Surgery, University of Milano-Bicocca, Monza 20900, Italy
| | - Valentina Sciola
- Gastroenterology and Endoscopy Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milano 20100, Italy
| | | | - Silvio Danese
- Department of Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele, Milan 20132, Italy
- School of Medicine, Vita-Salute San Raffaele University, Milan 20132, Italy
| | - Pietro Invernizzi
- Gastroenterology Unit, Fondazione IRCCS San Gerardo dei Tintori, Monza 20900, Italy and Department of Medicine and Surgery, University of Milano-Bicocca, Monza 20900, Italy
| | - Sara Massironi
- Gastroenterology Unit, Fondazione IRCCS San Gerardo dei Tintori, Monza 20900, Italy and Department of Medicine and Surgery, University of Milano-Bicocca, Monza 20900, Italy
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Janfaza S, Khorsand B, Nikkhah M, Zahiri J. Digging deeper into volatile organic compounds associated with cancer. Biol Methods Protoc 2019; 4:bpz014. [PMID: 32161807 PMCID: PMC6994028 DOI: 10.1093/biomethods/bpz014] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/25/2019] [Indexed: 12/13/2022] Open
Abstract
Volatile organic compounds (VOCs), produced and emitted through the metabolism of cancer cells or the body's immune system, are considered novel cancer biomarkers for diagnostic purposes. Of late, a large number of work has been done to find a relationship between VOCs' signature of body and cancer. Cancer-related VOCs can be used to detect several types of cancers at the earlier stages which in turn provide a significantly higher chance of survival. Here we aim to provide an updated picture of cancer-related VOCs based on recent findings in this field focusing on cancer odor database.
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Affiliation(s)
- Sajjad Janfaza
- School of Engineering, University of British Columbia, Kelowna, BC, Canada
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Jalal Ale Ahmad Highway, Tehran 14117, Iran
| | - Babak Khorsand
- Department of Computer Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Maryam Nikkhah
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Jalal Ale Ahmad Highway, Tehran 14117, Iran
| | - Javad Zahiri
- Bioinformatics and Computational Omics Lab (BioCOOL), Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Jalal Ale Ahmad Highway, Tehran 14117, Iran
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Effects of the Usage of l-Cysteine (l-Cys) on Human Health. Molecules 2018; 23:molecules23030575. [PMID: 29510494 PMCID: PMC6017824 DOI: 10.3390/molecules23030575] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/27/2018] [Accepted: 03/01/2018] [Indexed: 12/17/2022] Open
Abstract
This review summarizes recent knowledge about the use of the amino acid l-Cysteine (l-Cys) through diet, nutritional supplements or drugs with the aim to improve human health or treat certain diseases. Three databases (PubMed, Scopus, and Web of Science) and different keywords have been used to create a database of documents published between 1950 and 2017 in scientific journals in English or Spanish. A total of 60,885 primary publications were ultimately selected to compile accurate information about the use of l-Cys in medicine and nutritional therapies and to identify the reported benefits of l-Cys on human health. The number of publications about the use of l-Cys for these purposes has increased significantly during the last two decades. This increase seems to be closely related to the rise of nutraceutical industries and personalized medicine. The main evidence reporting benefits of l-Cys usage is summarized. However, the lack of accurate information and studies based on clinical trials hampers consensus among authors. Thus, the debate about the role and effectiveness of supplements/drugs containing l-Cys is still open.
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Nieminen MT, Salaspuro M. Local Acetaldehyde-An Essential Role in Alcohol-Related Upper Gastrointestinal Tract Carcinogenesis. Cancers (Basel) 2018; 10:E11. [PMID: 29303995 PMCID: PMC5789361 DOI: 10.3390/cancers10010011] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/20/2017] [Accepted: 12/20/2017] [Indexed: 02/07/2023] Open
Abstract
The resident microbiome plays a key role in exposure of the upper gastrointestinal (GI) tract mucosa to acetaldehyde (ACH), a carcinogenic metabolite of ethanol. Poor oral health is a significant risk factor for oral and esophageal carcinogenesis and is characterized by a dysbiotic microbiome. Dysbiosis leads to increased growth of opportunistic pathogens (such as Candida yeasts) and may cause an up to 100% increase in the local ACH production, which is further modified by organ-specific expression and gene polymorphisms of ethanol-metabolizing and ACH-metabolizing enzymes. A point mutation in the aldehyde dehydrogenase 2 gene has randomized millions of alcohol consumers to markedly increased local ACH exposure via saliva and gastric juice, which is associated with a manifold risk for upper GI tract cancers. This human cancer model proves conclusively the causal relationship between ACH and upper GI tract carcinogenesis and provides novel possibilities for the quantitative assessment of ACH carcinogenicity in the human oropharynx. ACH formed from ethanol present in "non-alcoholic" beverages, fermented food, or added during food preparation forms a significant epidemiologic bias in cancer epidemiology. The same also concerns "free" ACH present in mutagenic concentrations in multiple beverages and foodstuffs. Local exposure to ACH is cumulative and can be reduced markedly both at the population and individual level. At best, a person would never consume tobacco, alcohol, or both. However, even smoking cessation and moderation of alcohol consumption are associated with a marked decrease in local ACH exposure and cancer risk, especially among established risk groups.
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Affiliation(s)
- Mikko T Nieminen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, and Helsinki University Central Hospital, University of Helsinki, Biomedicum Helsinki P.O. Box 63, 00014 Helsinki, Finland.
- Research Unit on Acetaldehyde and Cancer, University of Helsinki, Biomedicum Helsinki P.O. Box 63, 00014 Helsinki, Finland.
| | - Mikko Salaspuro
- Research Unit on Acetaldehyde and Cancer, University of Helsinki, Biomedicum Helsinki P.O. Box 63, 00014 Helsinki, Finland.
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Key role of local acetaldehyde in upper GI tract carcinogenesis. Best Pract Res Clin Gastroenterol 2017; 31:491-499. [PMID: 29195668 DOI: 10.1016/j.bpg.2017.09.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/11/2017] [Accepted: 09/22/2017] [Indexed: 01/31/2023]
Abstract
Ethanol is neither genotoxic nor mutagenic. Its first metabolite acetaldehyde, however, is a powerful local carcinogen. Point mutation in ALDH2 gene proves the causal relationship between acetaldehyde and upper digestive tract cancer in humans. Salivary acetaldehyde concentration and exposure time are the two major and quantifiable factors regulating the degree of local acetaldehyde exposure in the ideal target organ, oropharynx. Instant microbial acetaldehyde formation from alcohol represents >70% of total ethanol associated acetaldehyde exposure in the mouth. In the oropharynx and achlorhydric stomach acetaldehyde is not metabolized to safe products, instead in the presence of alcohol it accumulates in saliva and gastric juice in mutagenic concentrations. A common denominator in alcohol, tobacco and food associated upper digestive tract carcinogenesis is acetaldehyde. Epidemiological studies on upper GI tract cancer are biased, since they miss information on acetaldehyde exposure derived from alcohol and acetaldehyde present in 'non-alcoholic' beverages and food.
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Hellström PM, Hendolin P, Kaihovaara P, Kronberg L, Meierjohann A, Millerhovf A, Paloheimo L, Sundelin H, Syrjänen K, Webb DL, Salaspuro M. Slow-release L-cysteine capsule prevents gastric mucosa exposure to carcinogenic acetaldehyde: results of a randomised single-blinded, cross-over study of Helicobacter-associated atrophic gastritis. Scand J Gastroenterol 2017; 52:230-237. [PMID: 27806647 DOI: 10.1080/00365521.2016.1249403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
INTRODUCTION Helicobacter-induced atrophic gastritis with a hypochlorhydric milieu is a risk factor for gastric cancer. Microbes colonising acid-free stomach oxidise ethanol to acetaldehyde, a recognised group 1 carcinogen. OBJECTIVE To assess gastric production of acetaldehyde and its inert condensation product, non-toxic 2-methyl-1,3-thiazolidine-4-carboxylic acid (MTCA), after alcohol intake under treatment with slow-release L-cysteine or placebo. METHODS Seven patients with biopsy-confirmed atrophic gastritis, low serum pepsinogen and high gastrin-17 were studied in a cross-over single-blinded design. On separate days, patients randomly received 200 mg slow-release L-cysteine or placebo with intragastric instillation of 15% (0.3 g/kg) ethanol. After intake, gastric concentrations of ethanol, acetaldehyde, L-cysteine and MTCA were analysed. RESULTS Administration of L-cysteine increased MTCA (p < .0004) and decreased gastric acetaldehyde concentrations by 68% (p < .0001). The peak L-cysteine level was 7552 ± 2687 μmol/L at 40 min and peak MTCA level 196 ± 98 μmol/L at 80 min after intake. Gastric L-cysteine and MTCA concentrations were maintained for 3 h. The AUC for MTCA was 11-fold higher than acetaldehyde, indicating gastric first-pass metabolism of ethanol. With placebo, acetaldehyde remained elevated also at low ethanol concentrations representing 'non-alcoholic' beverages and food items. CONCLUSIONS After gastric ethanol instillation, slow-release L-cysteine eliminates acetaldehyde to form inactive MTCA, which remains in gastric juice for up to 3 h. High acetaldehyde levels indicate a marked gastric first-pass metabolism of ethanol resulting in gastric accumulation of carcinogenic acetaldehyde. Local exposure of the gastric mucosa to acetaldehyde can be mitigated by slow-release L-cysteine capsules.
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Affiliation(s)
- Per M Hellström
- a Department of Medical Sciences, Gastroenterology and Hepatology Unit , Uppsala University Hospital, Uppsala University , Uppsala , Sweden
| | - Panu Hendolin
- b Clinical Sciences , Biohit Oyj , Helsinki , Finland
| | - Pertti Kaihovaara
- b Clinical Sciences , Biohit Oyj , Helsinki , Finland.,c Research Unit on Acetaldehyde and Cancer, University of Helsinki , Helsinki , Finland
| | - Leif Kronberg
- d Laboratory of Organic Chemistry , Johan Gadolin Process Chemistry Centre, Åbo Akademi University , Turku , Finland
| | - Axel Meierjohann
- d Laboratory of Organic Chemistry , Johan Gadolin Process Chemistry Centre, Åbo Akademi University , Turku , Finland
| | - Anders Millerhovf
- e Clinical Trial Consultants , Uppsala University Hospital , Uppsala , Sweden
| | - Lea Paloheimo
- b Clinical Sciences , Biohit Oyj , Helsinki , Finland
| | - Heidi Sundelin
- d Laboratory of Organic Chemistry , Johan Gadolin Process Chemistry Centre, Åbo Akademi University , Turku , Finland
| | - Kari Syrjänen
- b Clinical Sciences , Biohit Oyj , Helsinki , Finland
| | - Dominic-Luc Webb
- a Department of Medical Sciences, Gastroenterology and Hepatology Unit , Uppsala University Hospital, Uppsala University , Uppsala , Sweden
| | - Mikko Salaspuro
- c Research Unit on Acetaldehyde and Cancer, University of Helsinki , Helsinki , Finland
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Neuman MG, French SW, Zakhari S, Malnick S, Seitz HK, Cohen LB, Salaspuro M, Voinea-Griffin A, Barasch A, Kirpich IA, Thomes PG, Schrum LW, Donohue TM, Kharbanda KK, Cruz M, Opris M. Alcohol, microbiome, life style influence alcohol and non-alcoholic organ damage. Exp Mol Pathol 2017; 102:162-180. [PMID: 28077318 DOI: 10.1016/j.yexmp.2017.01.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 01/04/2017] [Indexed: 02/06/2023]
Abstract
This paper is based upon the "8th Charles Lieber's Satellite Symposium" organized by Manuela G. Neuman at the Research Society on Alcoholism Annual Meeting, on June 25, 2016 at New Orleans, Louisiana, USA. The integrative symposium investigated different aspects of alcohol-induced liver disease (ALD) as well as non-alcohol-induced liver disease (NAFLD) and possible repair. We revealed the basic aspects of alcohol metabolism that may be responsible for the development of liver disease as well as the factors that determine the amount, frequency and which type of alcohol misuse leads to liver and gastrointestinal diseases. We aimed to (1) describe the immuno-pathology of ALD, (2) examine the role of genetics in the development of alcoholic hepatitis (ASH) and NAFLD, (3) propose diagnostic markers of ASH and non-alcoholic steatohepatitis (NASH), (4) examine age and ethnic differences as well as analyze the validity of some models, (5) develop common research tools and biomarkers to study alcohol-induced effects, 6) examine the role of alcohol in oral health and colon and gastrointestinal cancer and (7) focus on factors that aggravate the severity of organ-damage. The present review includes pre-clinical, translational and clinical research that characterizes ALD and NAFLD. Strong clinical and experimental evidence lead to recognition of the key toxic role of alcohol in the pathogenesis of ALD with simple fatty infiltrations and chronic alcoholic hepatitis with hepatic fibrosis or cirrhosis. These latter stages may also be associated with a number of cellular and histological changes, including the presence of Mallory's hyaline, megamitochondria, or perivenular and perisinusoidal fibrosis. Genetic polymorphisms of ethanol metabolizing enzymes and cytochrome p450 (CYP) 2E1 activation may change the severity of ASH and NASH. Other risk factors such as its co-morbidities with chronic viral hepatitis in the presence or absence of human deficiency virus were discussed. Dysregulation of metabolism, as a result of ethanol exposure, in the intestine leads to colon carcinogenesis. The hepatotoxic effects of ethanol undermine the contribution of malnutrition to the liver injury. Dietary interventions such as micro and macronutrients, as well as changes to the microbiota have been suggested. The clinical aspects of NASH, as part of the metabolic syndrome in the aging population, have been presented. The symposium addressed mechanisms and biomarkers of alcohol induced damage to different organs, as well as the role of the microbiome in this dialog. The microbiota regulates and acts as a key element in harmonizing immune responses at intestinal mucosal surfaces. It is known that microbiota is an inducer of proinflammatory T helper 17 cells and regulatory T cells in the intestine. The signals at the sites of inflammation mediate recruitment and differentiation in order to remove inflammatory inducers and promote tissue homeostasis restoration. The change in the intestinal microbiota also influences the change in obesity and regresses the liver steatosis. Evidence on the positive role of moderate alcohol consumption on heart and metabolic diseases as well on reducing steatosis have been looked up. Moreover nutrition as a therapeutic intervention in alcoholic liver disease has been discussed. In addition to the original data, we searched the literature (2008-2016) for the latest publication on the described subjects. In order to obtain the updated data we used the usual engines (Pub Med and Google Scholar). The intention of the eighth symposia was to advance the international profile of the biological research on alcoholism. We also wish to further our mission of leading the forum to progress the science and practice of translational research in alcoholism.
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Affiliation(s)
- Manuela G Neuman
- In Vitro Drug Safety and Biotechnology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Department of Pharmacology and Toxicology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
| | | | | | - Stephen Malnick
- Department Internal Medicine, Kaplan Medical Centre and Hebrew University of Jerusalem, Rehovot, Israel
| | - Helmut K Seitz
- Centre of Alcohol Research, University of Heidelberg, Heidelberg, Germany
| | - Lawrence B Cohen
- Division of Gastroenterology, Sunnybrook Health Sciences Centre, Department of Medicine, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Mikko Salaspuro
- Research Unit on Acetaldehyde and Cancer, University of Helsinki, Helsinki, Finland
| | - Andreea Voinea-Griffin
- Public Health Science Texas A&M University, College of Dentistry, Dallas University, TX, USA
| | - Andrei Barasch
- Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Irina A Kirpich
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Paul G Thomes
- Department of Internal Medicine, Carolinas Medical Center, Charlotte, NC, USA; Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Laura W Schrum
- Department of Internal Medicine, Carolinas Medical Center, Charlotte, NC, USA
| | - Terrence M Donohue
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Kusum K Kharbanda
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, University of Nebraska Medical Center, Omaha, NE, USA; Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Marcus Cruz
- In Vitro Drug Safety and Biotechnology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Department of Pharmacology and Toxicology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Mihai Opris
- Department of Pharmacology and Toxicology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Family Medicine Clinic CAR, Bucharest, Romania
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Maejima R, Iijima K, Kaihovaara P, Hatta W, Koike T, Imatani A, Shimosegawa T, Salaspuro M. Effects of ALDH2 genotype, PPI treatment and L-cysteine on carcinogenic acetaldehyde in gastric juice and saliva after intragastric alcohol administration. PLoS One 2015; 10:e0120397. [PMID: 25831092 PMCID: PMC4382225 DOI: 10.1371/journal.pone.0120397] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 01/21/2015] [Indexed: 12/12/2022] Open
Abstract
Acetaldehyde (ACH) associated with alcoholic beverages is Group 1 carcinogen to humans (IARC/WHO). Aldehyde dehydrogenase (ALDH2), a major ACH eliminating enzyme, is genetically deficient in 30-50% of Eastern Asians. In alcohol drinkers, ALDH2-deficiency is a well-known risk factor for upper aerodigestive tract cancers, i.e., head and neck cancer and esophageal cancer. However, there is only a limited evidence for stomach cancer. In this study we demonstrated for the first time that ALDH2 deficiency results in markedly increased exposure of the gastric mucosa to acetaldehyde after intragastric administration of alcohol. Our finding provides concrete evidence for a causal relationship between acetaldehyde and gastric carcinogenesis. A plausible explanation is the gastric first pass metabolism of ethanol. The gastric mucosa expresses alcohol dehydrogenase (ADH) enzymes catalyzing the oxidation of ethanol to acetaldehyde, especially at the high ethanol concentrations prevailing in the stomach after the consumption of alcoholic beverages. The gastric mucosa also possesses the acetaldehyde-eliminating ALDH2 enzyme. Due to decreased mucosal ALDH2 activity, the elimination of ethanol-derived acetaldehyde is decreased, which results in its accumulation in the gastric juice. We also demonstrate that ALDH2 deficiency, proton pump inhibitor (PPI) treatment, and L-cysteine cause independent changes in gastric juice and salivary acetaldehyde levels, indicating that intragastric acetaldehyde is locally regulated by gastric mucosal ADH and ALDH2 enzymes, and by oral microbes colonizing an achlorhydric stomach. Markedly elevated acetaldehyde levels were also found at low intragastric ethanol concentrations corresponding to the ethanol levels of many foodstuffs, beverages, and dairy products produced by fermentation. A capsule that slowly releases L-cysteine effectively eliminated acetaldehyde from the gastric juice of PPI-treated ALDH2-active and ALDH2-deficient subjects. These results provide entirely novel perspectives for the prevention of gastric cancer, especially in established risk groups.
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Affiliation(s)
- Ryuhei Maejima
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Katsunori Iijima
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Pertti Kaihovaara
- Research Unit on Acetaldehyde and Cancer, University of Helsinki, Helsinki, Finland
| | - Waku Hatta
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomoyuki Koike
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Imatani
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tooru Shimosegawa
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Mikko Salaspuro
- Research Unit on Acetaldehyde and Cancer, University of Helsinki, Helsinki, Finland
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Wang HL, Zhou PY, Liu P, Zhang Y. ALDH2 and ADH1 genetic polymorphisms may contribute to the risk of gastric cancer: a meta-analysis. PLoS One 2014; 9:e88779. [PMID: 24633362 PMCID: PMC3954547 DOI: 10.1371/journal.pone.0088779] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 01/13/2014] [Indexed: 01/11/2023] Open
Abstract
AIM We conducted a meta-analysis of case-control studies to determine whether ALDH2, ADH1 and ADH2 genetic polymorphisms contribute to the pathogenesis of gastric cancer. METHODS The PubMed, CISCOM, CINAHL, Web of Science, Google Scholar, EBSCO, Cochrane Library, and CBM databases were searched for relevant articles published before November 1st, 2013 without any language restrictions. Meta-analysis was conducted using the STATA 12.0 software. We calculated crude odds ratios (ORs) with their 95% confidence intervals (95%CI) to evaluate their relationships under five genetic models. Seven case-control studies with a total of 2,563 gastric cancer patients and 4,192 healthy controls met the inclusion criteria. Nine common polymorphisms were evaluated, including rs671, rs16941667 and rs886205 in the ALDH2 gene, rs1230025, rs13123099, rs698 and rs1693482 in the ADH1 gene, and rs1229984 and rs17033 in the ADH2 gene. RESULTS The results of our meta-analysis suggested that ALDH2 genetic polymorphisms might be strongly correlated with an increased risk of gastric cancer (allele model: OR = 1.21, 95%CI: 1.11 ∼ 1.32, P<0.001; dominant model: OR = 1.23, 95%CI: 1.09 ∼ 1.39, P = 0.001; respectively), especially for rs671 polymorphism. Furthermore, we observed significant associations between ADH1 genetic polymorphisms and an increased risk of gastric cancer (allele model: OR = 1.21, 95%CI: 1.08 ∼ 1.36, P = 0.001; dominant model: OR = 10.52, 95%CI: 3.04 ∼ 36.41, P<0.001; respectively), especially for rs1230025 polymorphism. Nevertheless, no positive relationships were found between ADH2 genetic polymorphisms and gastric cancer risk (all P>0.05). CONCLUSION The current meta-analysis suggests that ALDH2 and ADH1 genetic polymorphisms may play crucial roles in the pathogenesis of gastric cancer. However, ADH2 genetic polymorphisms may not be important dominants of susceptibility to gastric cancer.
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Affiliation(s)
- He-Ling Wang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, P. R. China
- * E-mail:
| | - Ping-Yi Zhou
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, P. R. China
| | - Peng Liu
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, P. R. China
| | - Yu Zhang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, P. R. China
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11
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Huang J, Kumar S, Abbassi-Ghadi N, Spaněl P, Smith D, Hanna GB. Selected ion flow tube mass spectrometry analysis of volatile metabolites in urine headspace for the profiling of gastro-esophageal cancer. Anal Chem 2013; 85:3409-16. [PMID: 23421902 DOI: 10.1021/ac4000656] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Urine is considered an ideal biofluid for clinical investigation because it is obtained noninvasively and relatively large volumes are easily acquired. In this study, selected ion flow tube mass spectrometry (SIFT-MS) has been applied for the quantification of volatile organic compounds (VOCs) in the headspace vapor of urine samples, which were retrieved from three groups of patients with gastro-esophageal cancer, noncancer diseases of the upper gastro-intestinal tract, and a healthy cohort. Eleven VOCs have been investigated in this study. The concentrations of seven VOCs-acetaldehyde, acetone, acetic acid, hexanoic acid, hydrogen sulfide, methanol, and phenol-were found to be significantly different between cancer, positive control, and healthy groups using the Kruskal-Wallis test. The concentrations of acetaldehyde, acetone, acetic acid, hexanoic acid, hydrogen sulfide, and methanol were increased in the cancer cohort compared with healthy controls while the concentration of phenol decreased. The differences in the concentrations of ethanol, propanol, methyl phenol, and ethyl phenol were not significant between cancer and control groups. Receiver operating characteristics (ROC) analysis was applied for a combination of six VOCs (acetaldehyde, acetone, acetic acid, hexanoic acid, hydrogen sulfide, and methanol) to discriminate cancer patients from noncancer controls. The integrated area under ROC curve is 0.904. This result indicates that VOC profiling may be suitable in identifying those at high risk of gastro-esophageal cancer. Therefore, further investigations should be undertaken to assess the potential for VOC profiling as a new screening test in gastro-esophageal cancer.
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Affiliation(s)
- Juzheng Huang
- Department of Surgery and Cancer, Imperial College London, St Mary's Hospital, London, United Kingdom
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Kumar S, Huang J, Cushnir JR, Španěl P, Smith D, Hanna GB. Selected ion flow tube-MS analysis of headspace vapor from gastric content for the diagnosis of gastro-esophageal cancer. Anal Chem 2012; 84:9550-7. [PMID: 23035898 DOI: 10.1021/ac302409a] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Gastric content is a complex biofluid within the human stomach which has an important role in digestive processes. It is believed that gastric content may be a contributory factor in the development of upper gastro-intestinal diseases. In this work, selected ion flow tube mass spectrometry (SIFT-MS) has been applied to the quantification of volatile organic compounds (VOCs) in the headspace vapor of gastric content samples, which were retrieved from three groups of patients, including those with gastro-esophageal cancer, noncancer diseases of the upper gastro-intestinal tract, and a healthy cohort. Twelve VOCs have been investigated in this study; the following 7 VOCs, acetone, formaldehyde, acetaldehyde, hexanoic acid, hydrogen sulphide, hydrogen cyanide, and methyl phenol, were found to be significantly different between cancer and healthy groups by the Mann-Whitney U test. Receiver operating characteristics (ROC) analysis was applied for the combined VOCs of acetaldehyde, formaldehyde, hydrogen sulphide, and methyl phenol to discriminate cancer patients from healthy controls. The area under the curve (AUC) was 0.9. This result raises the prospect that a VOC profile rather than a single biomarker may be preferable in the molecular-orientated diagnosis of gastro-oseophageal cancer, and this warrants further investigation to assess its potential application as a new diagnostic test.
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Affiliation(s)
- Sacheen Kumar
- Department of Surgery and Cancer, Imperial College London, 10th Floor QEQM Wing, St Mary's Hospital, London W2 1NY, United Kingdom
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Abstract
Cancer prevention is based on the identification of specific etiologic factors. Acetaldehyde derived from the alcoholic beverage itself and formed from ethanol endogenously has recently been classified by the International Agency for Research on Cancer/World Health Organization as a group 1 carcinogen to humans. This is based on the uniform epidemiological and biochemical evidence derived from individuals carrying alcohol and aldehyde dehydrogenase gene mutations. After drinking alcohol, these mutations are associated with increased exposure of the upper digestive tract to acetaldehyde and as well with a remarkably increased risk for upper gastrointestinal (GI) tract cancers. Acetaldehyde is the key intermediate in alcoholic fermentation and ethanol oxidation. Therefore, it is widely present in our environment. Furthermore, it is the most abundant carcinogenic compound of tobacco smoke. Most of the known risk factors for upper digestive tract cancer appear to be associated with an enhanced exposure of GI mucosa to locally formed acetaldehyde. In these process microbes, salivary glands and even mucosal cells appear to play an essential role. Consequently, in the presence of ethanol mutagenic acetaldehyde concentrations are found in the saliva, achlorhydric stomach and colon. Equal acetaldehyde concentrations are seen in saliva also during active smoking. ALDH2-deficiency and high active ADH1C result in two- to threefold salivary acetaldehyde concentrations after a dose of alcohol and this prevails for as long as ethanol is present in the blood and saliva. Regarding cancer prevention, the good news is that acetaldehyde exposure can be markedly reduced. This can be achieved by giving high priority for regulatory measures and consumer guidance.
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Affiliation(s)
- Mikko Salaspuro
- Research Unit on Acetaldehyde and Cancer, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland.
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Kartal-Hodzic A, Marvola T, Schmitt M, Harju K, Peltoniemi M, Sivén M. Permeability and toxicity characteristics of L-cysteine and 2-methyl-thiazolidine-4-carboxylic acid in Caco-2 cells. Pharm Dev Technol 2012; 18:1288-93. [PMID: 22356486 DOI: 10.3109/10837450.2012.659253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Acetaldehyde is a known mutagenic substance and has been classified as a group-one carcinogen by the WHO. It is possible to bind acetaldehyde locally in the gastrointestinal (GI) tract with the semi-essential amino acid l-cysteine, which reacts covalently with acetaldehyde and forms compound 2-methyl-thiozolidine-4-carboxylic acid (MTCA). The Caco-2 cell line was used to determine the permeation of l-cysteine and MTCA, as well as the possible cell toxicity of both substances. Neither of the substances permeated through the Caco-2 cells at the concentrations used in this study, and only the highest concentration of MTCA affected the viability of the cells in the MTT (3-[4,5-dimethylthiazol-2yl]-2,5-diphenyltetrazolium bromide) test. These results showed that when l-cysteine is administered in formulations releasing it locally in the lower parts of GI tract, it is not absorbed but can react with acetaldehyde, and that neither l-cysteine nor MTCA is harmful to the cells when present locally in the upper parts of GI tract. This study also shows that MTCA is sensitive at a lower pH of 5.5. Since stable MTCA is desired in different parts of the GI tract, this observation raises concern over the influence of lower pH on l-cysteine-containing product ability to bind and eliminate carcinogenic acetaldehyde.
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Affiliation(s)
- Alma Kartal-Hodzic
- Faculty of Pharmacy, Division of Biopharmaceutics and Pharmacokinetics, University of Helsinki, Helsinki, Finland.
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Agréus L, Kuipers EJ, Kupcinskas L, Malfertheiner P, Di Mario F, Leja M, Mahachai V, Yaron N, Van Oijen M, Perez GP, Rugge M, Ronkainen J, Salaspuro M, Sipponen P, Sugano K, Sung J. Rationale in diagnosis and screening of atrophic gastritis with stomach-specific plasma biomarkers. Scand J Gastroenterol 2012; 47:136-47. [PMID: 22242613 PMCID: PMC3279132 DOI: 10.3109/00365521.2011.645501] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 11/22/2011] [Accepted: 11/22/2011] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIMS Atrophic gastritis (AG) results most often from Helicobacter pylori (H. pylori) infection. AG is the most important single risk condition for gastric cancer that often leads to an acid-free or hypochlorhydric stomach. In the present paper, we suggest a rationale for noninvasive screening of AG with stomach-specific biomarkers. METHODS The paper summarizes a set of data on application of the biomarkers and describes how the test results could be interpreted in practice. RESULTS In AG of the gastric corpus and fundus, the plasma levels of pepsinogen I and/or the pepsinogen I/pepsinogen II ratio are always low. The fasting level of gastrin-17 is high in AG limited to the corpus and fundus, but low or non-elevated if the AG occurs in both antrum and corpus. A low fasting level of G-17 is a sign of antral AG or indicates high intragastric acidity. Differentiation between antral AG and high intragastric acidity can be done by assaying the plasma G-17 before and after protein stimulation, or before and after administration of the proton pump inhibitors (PPI). Amidated G-17 will rise if the antral mucosa is normal in structure. H. pylori antibodies are a reliable indicator of helicobacter infection, even in patients with AG and hypochlorhydria. CONCLUSIONS Stomach-specific biomarkers provide information about the stomach health and about the function of stomach mucosa and are a noninvasive tool for diagnosis and screening of AG and acid-free stomach.
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Affiliation(s)
- Lars Agréus
- Karolinska Institute, Center for Family and Community Medicine, Stockholm, Sweden
| | - Ernst J Kuipers
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Limas Kupcinskas
- Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Peter Malfertheiner
- University, Department of Gastroenterology, Hepatology and Infectious Diseases, Magdeburg, Germany
| | - Francesco Di Mario
- Department of Clinical Sciences, University of Parma, Section of Gastroenterology, Parma, Italy
| | - Marcis Leja
- Riga East University Hospital, Digestive Diseases Centre, Riga, Latvia
| | - Varocha Mahachai
- Department of Medicine, Division of Gastroenterology, Chulalongkorn University, Thailand
| | - Niv Yaron
- Department of Gastroenterology, Rabin Medical Center, Petah Tikva, Israel
| | - Martijn Van Oijen
- Dept. Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - Massimo Rugge
- Department of Pathology, University of Padova, Padova, Italy
| | | | - Mikko Salaspuro
- University of Helsinki, Research Unit on Acetaldehyde and Cancer, Helsinki, Finland
| | | | - Kentaro Sugano
- Department of Internal Medicine, Division of Gastroenterology, Jichi Medical University, Tochigi, Japan
| | - Joseph Sung
- Institute of Digestive Disease, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China
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